1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Cryptographic API.
4 *
5 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
6 * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
7 */
8 #ifndef _CRYPTO_INTERNAL_H
9 #define _CRYPTO_INTERNAL_H
10
11 #include <crypto/algapi.h>
12 #include <linux/completion.h>
13 #include <linux/jump_label.h>
14 #include <linux/list.h>
15 #include <linux/module.h>
16 #include <linux/notifier.h>
17 #include <linux/numa.h>
18 #include <linux/refcount.h>
19 #include <linux/rwsem.h>
20 #include <linux/sched.h>
21 #include <linux/types.h>
22
23 struct crypto_instance;
24 struct crypto_template;
25
26 struct crypto_larval {
27 struct crypto_alg alg;
28 struct crypto_alg *adult;
29 struct completion completion;
30 u32 mask;
31 bool test_started;
32 };
33
34 extern struct list_head crypto_alg_list;
35 extern struct rw_semaphore crypto_alg_sem;
36 extern struct blocking_notifier_head crypto_chain;
37
38 #ifdef CONFIG_CRYPTO_MANAGER_DISABLE_TESTS
crypto_boot_test_finished(void)39 static inline bool crypto_boot_test_finished(void)
40 {
41 return true;
42 }
set_crypto_boot_test_finished(void)43 static inline void set_crypto_boot_test_finished(void)
44 {
45 }
46 #else
47 DECLARE_STATIC_KEY_FALSE(__crypto_boot_test_finished);
crypto_boot_test_finished(void)48 static inline bool crypto_boot_test_finished(void)
49 {
50 return static_branch_likely(&__crypto_boot_test_finished);
51 }
set_crypto_boot_test_finished(void)52 static inline void set_crypto_boot_test_finished(void)
53 {
54 static_branch_enable(&__crypto_boot_test_finished);
55 }
56 #endif /* !CONFIG_CRYPTO_MANAGER_DISABLE_TESTS */
57
58 #ifdef CONFIG_PROC_FS
59 void __init crypto_init_proc(void);
60 void __exit crypto_exit_proc(void);
61 #else
crypto_init_proc(void)62 static inline void crypto_init_proc(void)
63 { }
crypto_exit_proc(void)64 static inline void crypto_exit_proc(void)
65 { }
66 #endif
67
crypto_cipher_ctxsize(struct crypto_alg * alg)68 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
69 {
70 return alg->cra_ctxsize;
71 }
72
crypto_compress_ctxsize(struct crypto_alg * alg)73 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
74 {
75 return alg->cra_ctxsize;
76 }
77
78 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
79 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
80
81 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
82 void crypto_larval_kill(struct crypto_alg *alg);
83 void crypto_wait_for_test(struct crypto_larval *larval);
84 void crypto_alg_tested(const char *name, int err);
85
86 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
87 struct crypto_alg *nalg);
88 void crypto_remove_final(struct list_head *list);
89 void crypto_shoot_alg(struct crypto_alg *alg);
90 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
91 u32 mask);
92 void *crypto_create_tfm_node(struct crypto_alg *alg,
93 const struct crypto_type *frontend, int node);
94
crypto_create_tfm(struct crypto_alg * alg,const struct crypto_type * frontend)95 static inline void *crypto_create_tfm(struct crypto_alg *alg,
96 const struct crypto_type *frontend)
97 {
98 return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE);
99 }
100
101 struct crypto_alg *crypto_find_alg(const char *alg_name,
102 const struct crypto_type *frontend,
103 u32 type, u32 mask);
104
105 void *crypto_alloc_tfm_node(const char *alg_name,
106 const struct crypto_type *frontend, u32 type, u32 mask,
107 int node);
108
crypto_alloc_tfm(const char * alg_name,const struct crypto_type * frontend,u32 type,u32 mask)109 static inline void *crypto_alloc_tfm(const char *alg_name,
110 const struct crypto_type *frontend, u32 type, u32 mask)
111 {
112 return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE);
113 }
114
115 int crypto_probing_notify(unsigned long val, void *v);
116
117 unsigned int crypto_alg_extsize(struct crypto_alg *alg);
118
119 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
120 u32 type, u32 mask);
121
crypto_alg_get(struct crypto_alg * alg)122 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
123 {
124 refcount_inc(&alg->cra_refcnt);
125 return alg;
126 }
127
crypto_alg_put(struct crypto_alg * alg)128 static inline void crypto_alg_put(struct crypto_alg *alg)
129 {
130 if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
131 alg->cra_destroy(alg);
132 }
133
crypto_tmpl_get(struct crypto_template * tmpl)134 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
135 {
136 return try_module_get(tmpl->module);
137 }
138
crypto_tmpl_put(struct crypto_template * tmpl)139 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
140 {
141 module_put(tmpl->module);
142 }
143
crypto_is_larval(struct crypto_alg * alg)144 static inline int crypto_is_larval(struct crypto_alg *alg)
145 {
146 return alg->cra_flags & CRYPTO_ALG_LARVAL;
147 }
148
crypto_is_dead(struct crypto_alg * alg)149 static inline int crypto_is_dead(struct crypto_alg *alg)
150 {
151 return alg->cra_flags & CRYPTO_ALG_DEAD;
152 }
153
crypto_is_moribund(struct crypto_alg * alg)154 static inline int crypto_is_moribund(struct crypto_alg *alg)
155 {
156 return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
157 }
158
crypto_notify(unsigned long val,void * v)159 static inline void crypto_notify(unsigned long val, void *v)
160 {
161 blocking_notifier_call_chain(&crypto_chain, val, v);
162 }
163
crypto_yield(u32 flags)164 static inline void crypto_yield(u32 flags)
165 {
166 if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
167 cond_resched();
168 }
169
crypto_is_test_larval(struct crypto_larval * larval)170 static inline int crypto_is_test_larval(struct crypto_larval *larval)
171 {
172 return larval->alg.cra_driver_name[0];
173 }
174
175 #endif /* _CRYPTO_INTERNAL_H */
176
177